Welding Preheat Interpass: titanium
Minimum preheat and maximum interpass temperatures for welding per AWS D1.1, ASME BPVC, ASME B31.3, and EN 1011. Covers carbon steels (AWS categories A/B), HSLA (category C, HPS 70W/100W), quenched and tempered (category D), Cr-Mo alloys (P5/P11/P22/P91/P4/P5B), austenitic stainless (P8), duplex stainless (P10H), nickel alloys, aluminum, titanium, and copper. Each record includes base metal group, thickness range, carbon equivalent, preheat/interpass temperatures in both F and C, PWHT requirements, hydrogen control level, and welding process notes. 46 records.
| base metal group | AWS group number | PWHT required | base metal examples | hydrogen control | interpass max C (degC) | interpass max F (degF) | preheat min C (degC) | preheat min F (degF) | record key | thickness range in | thickness range mm | welding process notes |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| titanium | F-No.51-55 | no | Grade 2 CP / Grade 5 Ti-6Al-4V / Grade 12 | standard | 93 | 200 | 0 | 32 | F-No.51-55#any | any | any | No preheat required; max interpass 200°F; rigorous shielding gas coverage (trailing shields) mandatory to prevent O2/N2 embrittlement; >250 HV HAZ hardness indicates contamination |
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